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1da177e4 LT |
1 | /* |
2 | * Copyright (C) 2001 Matthew Wilcox <willy at parisc-linux.org> | |
3 | * Copyright (C) 2003 Carlos O'Donell <carlos at parisc-linux.org> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | #ifndef _PARISC64_KERNEL_SIGNAL32_H | |
20 | #define _PARISC64_KERNEL_SIGNAL32_H | |
21 | ||
22 | #include <linux/compat.h> | |
f671c45d | 23 | |
f671c45d KM |
24 | /* 32-bit ucontext as seen from an 64-bit kernel */ |
25 | struct compat_ucontext { | |
26 | compat_uint_t uc_flags; | |
27 | compat_uptr_t uc_link; | |
28 | compat_stack_t uc_stack; /* struct compat_sigaltstack (12 bytes)*/ | |
29 | /* FIXME: Pad out to get uc_mcontext to start at an 8-byte aligned boundary */ | |
30 | compat_uint_t pad[1]; | |
31 | struct compat_sigcontext uc_mcontext; | |
32 | compat_sigset_t uc_sigmask; /* mask last for extensibility */ | |
33 | }; | |
1da177e4 LT |
34 | |
35 | /* ELF32 signal handling */ | |
36 | ||
f671c45d KM |
37 | int copy_siginfo_to_user32 (compat_siginfo_t __user *to, siginfo_t *from); |
38 | int copy_siginfo_from_user32 (siginfo_t *to, compat_siginfo_t __user *from); | |
39 | ||
40 | /* In a deft move of uber-hackery, we decide to carry the top half of all | |
41 | * 64-bit registers in a non-portable, non-ABI, hidden structure. | |
42 | * Userspace can read the hidden structure if it *wants* but is never | |
7022672e | 43 | * guaranteed to be in the same place. In fact the uc_sigmask from the |
f671c45d KM |
44 | * ucontext_t structure may push the hidden register file downards |
45 | */ | |
46 | struct compat_regfile { | |
47 | /* Upper half of all the 64-bit registers that were truncated | |
48 | on a copy to a 32-bit userspace */ | |
49 | compat_int_t rf_gr[32]; | |
50 | compat_int_t rf_iasq[2]; | |
51 | compat_int_t rf_iaoq[2]; | |
52 | compat_int_t rf_sar; | |
53 | }; | |
54 | ||
55 | #define COMPAT_SIGRETURN_TRAMP 4 | |
56 | #define COMPAT_SIGRESTARTBLOCK_TRAMP 5 | |
57 | #define COMPAT_TRAMP_SIZE (COMPAT_SIGRETURN_TRAMP + \ | |
58 | COMPAT_SIGRESTARTBLOCK_TRAMP) | |
59 | ||
60 | struct compat_rt_sigframe { | |
61 | /* XXX: Must match trampoline size in arch/parisc/kernel/signal.c | |
62 | Secondary to that it must protect the ERESTART_RESTARTBLOCK | |
63 | trampoline we left on the stack (we were bad and didn't | |
64 | change sp so we could run really fast.) */ | |
65 | compat_uint_t tramp[COMPAT_TRAMP_SIZE]; | |
66 | compat_siginfo_t info; | |
67 | struct compat_ucontext uc; | |
68 | /* Hidden location of truncated registers, *must* be last. */ | |
69 | struct compat_regfile regs; | |
70 | }; | |
71 | ||
72 | /* | |
73 | * The 32-bit ABI wants at least 48 bytes for a function call frame: | |
74 | * 16 bytes for arg0-arg3, and 32 bytes for magic (the only part of | |
75 | * which Linux/parisc uses is sp-20 for the saved return pointer...) | |
76 | * Then, the stack pointer must be rounded to a cache line (64 bytes). | |
77 | */ | |
78 | #define SIGFRAME32 64 | |
79 | #define FUNCTIONCALLFRAME32 48 | |
80 | #define PARISC_RT_SIGFRAME_SIZE32 (((sizeof(struct compat_rt_sigframe) + FUNCTIONCALLFRAME32) + SIGFRAME32) & -SIGFRAME32) | |
81 | ||
1da177e4 LT |
82 | void sigset_32to64(sigset_t *s64, compat_sigset_t *s32); |
83 | void sigset_64to32(compat_sigset_t *s32, sigset_t *s64); | |
1da177e4 LT |
84 | long restore_sigcontext32(struct compat_sigcontext __user *sc, |
85 | struct compat_regfile __user *rf, | |
86 | struct pt_regs *regs); | |
87 | long setup_sigcontext32(struct compat_sigcontext __user *sc, | |
88 | struct compat_regfile __user *rf, | |
89 | struct pt_regs *regs, int in_syscall); | |
90 | ||
91 | #endif |